package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.LoginFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        if (employee.getStatus() == 0){
            throw new LoginFailedException("账户被禁用");
        }

        //密码比对
        // DO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //补充员工属性
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);
        //新增
        employeeMapper.insert(employee);
    }

    @Override
    public void stStatus(Integer status, Integer id) {
        employeeMapper.setStatus(status,id);
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        employeeMapper.update(employeeDTO);
    }

    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        List<Employee> list = employeeMapper.findAll(employeePageQueryDTO);
        Page<Employee> p = (Page<Employee>) list;
        return new PageResult(p.getTotal(),p.getResult());
    }

    @Override
    public Employee findById(Long id) {
        Employee employee = employeeMapper.findById(id);
        return employee;
    }

    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        //从线程令牌获得ID
        Long empId = BaseContext.getCurrentId();

        //根据ID获得用户数据
        Employee byId = employeeMapper.findById(empId);

        //密码对比
        String password = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        if (!password.equals(byId.getPassword())){
            throw new PasswordErrorException("密码错误");
        }

        //对比通过设置 ID和新密码
        passwordEditDTO.setEmpId(empId);
        String newPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());
        passwordEditDTO.setNewPassword(newPassword);

        employeeMapper.updatePassword(passwordEditDTO);
    }

}
